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1,3-DIMETHYLUREA

ICSC: 1745
N,N'-Dimethylurea
sym-Dimethylurea
N,N'-Dimethylharnstoff
(CH3NH)2CO/C3H8N20
Molecular mass: 88.1
ICSC # 1745		 CAS # 96-31-1
RTECS # YS9868000
November 24, 2009 Validated
De, GHS rechecked

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. 29, 30, 31, 32
 		 NO open flames.
 		 Carbon dioxide, water spray.
 
EXPLOSION Finely dispersed particles form explosive mixtures in air.
 
 
 
EXPOSURE
 		 PREVENT DISPERSION OF DUST!
 
 
•INHALATION Cough.
 		 Local exhaust.
 		 Fresh air, rest.
 
•SKIN Redness.
 		 Protective gloves.
 		 Rinse and then wash skin with water and soap.
 
•EYES Redness.
 		 Safety goggles
 		 Rinse with plenty of water (remove contact lenses if easily possible).
 
•INGESTION
 		 Do not eat, drink, or smoke during work.
 		 Rinse mouth. Give one or two glasses of water to drink.
 

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING
Personal protection: particulate filter adapted to the airborne concentration of the substance. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water. 8-270°C, 26, 31
 		 °C and flash point=154°C, but substance is solid
 		 Signal: Warning
Causes mild skin irritation
Causes eye irritation
 
ICSC: 1745 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values

1,3-DIMETHYLUREA

 ICSC: 1745

I

M

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T

A

N

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D

A

T

A

 
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO WHITE CRYSTALLINE POWDER.

PHYSICAL DANGERS:
Dust explosion possible if in powder or granular form, mixed with air.

CHEMICAL DANGERS:
The substance decomposes on heating producing nitrogen oxides. The solution in water is a weak base. Reacts with strong reducing agents causing fire hazard. 31; pH=9-9.5; ammable gases (CAMEO)

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK not established.


 		 ROUTES OF EXPOSURE:


INHALATION RISK:
No indication can be given about the rate in which a harmful concentration of this substance in the air is reached.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is mildly irritating to the eyes and the skin. iluted in water

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
 

PHYSICAL
PROPERTIES

 
Boiling point: 268-270°C
Melting point: 102-107°C
Density: 1.1
g/cm⊃3;
Solubility in water, g/100 ml at 21.5°C: 76.5
(good)
 		 Vapour pressure, Pa at 20°C: 0.042
Flash point: 154°C
Auto-ignition temperature: 400°C
Octanol/water partition coefficient as log Pow: -0.78

ENVIRONMENTAL
DATA

 
 

N O T E S

ADDITIONAL INFORMATION

 
 
ICSC: 1745 1,3-DIMETHYLUREA
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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